Improvement in windmills



UNITED STATES PATENT OEEIcE' FRANCIS M. WILSON, OF TEKAMAH, NEBRASKA,ASSIGNOR TO HIMSELF AND JAMES FULLEN, OF SAME PLACE.

IMPROVEMENT lN' WINDMILLS.

Specification forming part of Letters Patent No. 216,481, dated J unc10, 1879; application filed April 8, 1879.

To all whom it may concern.-

Be it known that I, FRANCIS MARION-WIL- soN, of Tekamah, in the countyof Burt and State of Nebraska, have invented a new and ImprovedWindmill, of which the following is a specification.

Figure 1 is a side elevation of the windmill. Fig. 2 is a rear elevationof the same. Fig. 3 is a plan on line a: m, Fig. 1.

Similar letters of reference indicate corresponding parts. a

The object of this invention is to provide a windmill that shall excelothers in simplicity of construction, durability, ease of adjustment,and economy of power.

The invention consists of the shaft A, journaled in the frame B, that issupported by and revolves on the hollow standard C. On the extreme outerend of this shaft is the hub D, provided with four radial spokes, E E,on each of which is pivoted, by staples a a, a circular wing, F. On thesame shaft A is the cruciform sliding head G, and also the spiral springH, whose fun ction is to keep thewin gs full y spread, between the huband thehead. TherodsIl con: nect each arm of the head with itsrespective wing in such amanner that an excess of windpressure upon thewings will cause them to feather against the opposing action of thespring.

K is a supplementary sliding head on the same shaft with pitmen L,extending rearward, and connecting with the bell-crank M, while betweenG and K is a washer, b, to lessen the friction between them. This crankM is piv-. oted in staples driven into a cross-timber of the frame, andhas an upwardly-projecting arm, to which the cord or wire 0 is attached,and which is led down through the hollow standard. By pulling upon thisrope the supplementary head K is made to slide forward upon the shaft A,so as to push the head G outward and cause the wings to feather to anydesired angle, and thus the speed and power of the mill may be regulatedat will.

To the end of the shaft A opposite from the wings is secured theeccentric N, connected by the pitman d to an arm of the double-crankedshaftO, that is journaled on the frame B; and to this cranked shaft issecured the vertical shaft P, that passes down through the hollowstandard, and by which power is transmitted to the machinery below. Thisarrangement of the eccentric with the double-crank shaft constitutes alever capable of transmitting a much larger percentage of the power ofthe wings than any device heretofore employed on windmills, so that, toobtain the same efiect with a given force of wind, I am able to use muchsmaller and lighter wings than can those who have not this device.

It will be seen that the apparatus is very simple and not liable to getout of order.

The vane S is rigidly secured to the top of the frame 13.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- 1. The within-described windmill, consisting ofshaft A, frame 13, standard 0, hub D, spokes E E, and circular wings FF, in combination with the sliding heads G and K,'spiral spring H, rodsI I, pitmen L L, crank M, washer b, eccentric N, pitman d,double-cranked shaft 0, shaft P, and vane S, substantially ashereinshown and described.

2. In the construction of a windmill, the eccentric N, pitman d, anddouble-cranked shaft 0, substantiallyas herein shown and described.

3. The combination of the shaft A, hub I), spokes E E, circular wings FF, sliding heads G and K, washer b, pitmen L L, crank M, eccentric N,pitman d, and doublecranked shaft 0, substantially as herein shown anddescribed.

FRANCIS MARION WILSON.

Witnesses G. W. GONKLING, WM. H. WOMACK.

